<template>
<div>
    <!--面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图-->

    <el-card>
        <el-row>
            <el-col>
                <el-button type="primary" @click="addDialogRoleVisible =true">添加角色</el-button>
            </el-col>
        </el-row>

        <!-- 角色列表区域-->
        <el-table :data="rolelist" border :stripe="true">
            <!-- 展开列-->
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :class="['bdbottom',i1 ===0 ? 'bdtop' : '','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                        <!--渲染一级权限-->
                        <el-col :span="5">
                            <el-tag type="" closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级和三级权限-->
                        <el-col :span="19">
                            <!--通过 for 循环 嵌套渲染二级权限-->
                            <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
                                        {{item3.authName}}
                                    </el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                    <!-- <pre>{{scope.row}}</pre> -->
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作">
                <template slot-scope="scope" width="300px">
                    <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditRoleDialog(scope.row.id)">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>
    <!-- 添加角色对话框-->
    <el-dialog title="角色" :visible.sync="addDialogRoleVisible" width="30%">
        <!-- 内容主体区域-->
        <el-form :model="addRoleForm" :rules="addRoleFormRules" ref="addRoleFormRef" label-width="80px">
            <el-form-item label="角色名" prop="roleName">
                <el-input v-model="addRoleForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="addRoleForm.roleDesc"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="resetAddRoleHandle">取 消</el-button>
            <el-button type="primary" @click="addRole">确 定</el-button>
        </span>
    </el-dialog>
    <!--修改角色对话框-->
    <el-dialog title="修改角色" :visible.sync="editRoleDialogVisible" width="30%" @close="editRoleDialogClosed">
        <!-- 内容主体区域-->
        <el-form :model="editRoleForm" :rules="addRoleFormRules" ref="editRoleFormRef" label-width="70px">
            <el-form-item label="角色ID">
                <el-input v-model="editRoleForm.roleId" disabled></el-input>
            </el-form-item>

            <el-form-item label="角色名称">
                <el-input v-model="editRoleForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述">
                <el-input v-model="editRoleForm.roleDesc"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="editRoleDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click=" editRoleInfo">确 定</el-button>
        </span>
    </el-dialog>

    <!-- 分配权限对话框-->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
        <!-- 树形控件 -->
        <el-tree :data="rightlist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editRoleInfo">确 定</el-button>
        </span>
    </el-dialog>
</div>
</template>

<script>
export default {
    data() {
        return {
            //所有角色列表数据
            rolelist: [],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible: false,
            // 所有权限的数据
            rightlist: [],
            // 树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点id值数组
            defKeys: [

            ],
            // 当前即将分配权限的角色id
            roleId: '',
            // 控制添加角色对话框显示与隐藏
            addDialogRoleVisible: false,
            // 添加角色
            addRoleForm: {
                roleName: '',
                roleDesc: ''

            },
            // 添加角色的用户规则对象
            addRoleFormRules: {
                roleName: [{
                    required: true,
                    message: '请输入角色名',
                    trigger: 'blur'
                }, {
                    min: 3,
                    max: 10,
                    message: '用户名的长度在3~10个字符之间',
                    trigger: 'blur'
                }],
                roleDesc: [{
                    required: true,
                    message: '请输入角色描述',
                    trigger: 'blur'
                }, {
                    min: 3,
                    max: 10,
                    message: '用户名的长度在3~15个字符之间',
                    trigger: 'blur'
                }],
            },
            // 控制编辑对话框的显示与隐藏
            editRoleDialogVisible: false,
            // 编辑角色
            editRoleForm: {}

        }
    },

    created() {
        this.getRolesList()
    },
    methods: {
        //获取所有角色的列表
        async getRolesList() {
            const {
                data: res
            } = await this.$http.get('roles')
            if (res.meta.status != 200) {
                return this.$message.error('获取角色列表失败')
            }
            this.rolelist = res.data
            // console.log(this.rolelist)
        },
        // 根据 id 删除对应的权限
        async removeRightById(role, rightsId) {
            // 弹框提示用户是否要删除
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if (confirmResult !== 'confirm') {
                return this.$message.info('取消了删除')
            }
            const {
                data: res
            } = await this.$http.delete(`roles/${role.id}/rights/${rightsId}`)
            if (res.meta.status != 200) {
                return this.$message.error('删除权限失败！')
            }

            // 会刷新整个权限列表
            //this.getRolesList();

            //给权限重新赋值

            role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id

            // 获取所有权限的数据
            const {
                data: res
            } = await this.$http.get('rights/tree')
            console.log(res.meta.status)
            if (res.meta.status !== 200) {
                return this.$message.error('获取权限失败！')
            }

            // 把获取到的权限数据保存到data中
            this.rightlist = res.data
            // console.log(this.rightlist)
            // 递归调用三级节点的id 
            this.getLeafKeys(role, this.defKeys)

            this.setRightDialogVisible = true
        },
        // 通过递归的形式，获取角色下所有三级权限的id,并保存到  defKeys 的数组中
        getLeafKeys(node, arr) {
            // 如果当前 node 节点不包含 children 属性 ， 则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }

            node.children.forEach(item =>
                this.getLeafKeys(item, arr)
            )
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            console.log(idStr)
            const {
                data: res
            } = await this.$http.post(`roles/${this.roleId}/rights`, {
                rids: idStr
            })

            if (res.meta.status !== 200) {
                return this.$message.error('分配权限失败！')
            }

            this.$message.success('分配权限成功！')
            this.getRolesList()
            this.setRightDialogVisible = false
        },
        // 添加角色
        addRole() {
            this.$refs.addRoleFormRef.validate(async valid => {
                if (!valid) return false;
                // 可以发起添加角色的网络请求
                const {
                    data: res
                } = await this.$http.post('roles', this.addRoleForm)
                if (res.meta.status !== 201) this.$message.error('添加角色失败')
                this.$message.success('添加角色成功！')
                // 隐藏添加角色的对话框
                this.addDialogRoleVisible = false,
                    this.getRolesList()

            })

        },
        // 隐藏添加角色对话框
        resetAddRoleHandle() {
            this.$refs.addRoleFormRef.resetFields();
            this.addDialogRoleVisible = false
        },
        // 展示编辑角色对话框
        async showEditRoleDialog(id) {
            const {
                data: res
            } = await this.$http.get('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('查询角色失败！')
            }
            this.editRoleForm = res.data
            this.editRoleDialogVisible = true

        },

        // 监听编辑对话框关闭事件
        editRoleDialogClosed() {
            this.$refs.editRoleFormRef.resetFields()
        },
        // 修改角色信息并提交
        editRoleInfo() {
            this.$refs.editRoleFormRef.validate(async valid => {
                // console.log(this.editRoleForm)
                if (!valid) return false
                //  发起请求修改角色用户信息的数据请求
                const {
                    data: res
                } = await this.$http.put('roles/' + this.editRoleForm.roleId, {
                    roleName: this.editRoleForm.roleName,
                    roleDesc: this.editRoleForm.roleDesc
                })
                // console.log(res)
                if (res.meta.status !== 200) {
                    return this.$message.error('更新角色信息失败')
                }
                // 关闭对话框
                this.editRoleDialogVisible = false
                // 刷新角色列表
                this.getRolesList()
                // 提示修改成功
                this.$message.success('更新角色信息成功！')

            })
        },
        async removeRoleById(id) {
            const confirmResult = await this.$confirm('此操作将永久删除该用户，是否继续？', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'error'
            }).catch(err => err)
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }
            const {
                data: res
            } = await this.$http.delete('roles/' + id)

            if (res.meta.status !== 200) {
                return this.$message.error('删除用户失败！')
            }

            this.$message.success('删除用户成功！')
            this.getRolesList()
        }
    }

}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 7px;
}

.bdtop {
    border-top: 1px solid #eee
}

.bdbottom {
    border-bottom: 1px solid #eee;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>
